Auxiliary air and fume supply for explosive engines



March l 1927.

. A. v. cHAPlN AUXILIARY :AIR AND FUME SUPPLY FOR EXPLOSIVE ENGINES Originlal Filed Oct. 4, 1924.

attoznu Patented Mar. l, 1927.

UNITED STATES 1,619,330 PATENT ,o-FFICE,

ALFRED V. CHAPIN, SAN ANTONIO, TEXAS.

AUXIIIARY AIR AND FUME SUPPLY FOR EX-P-LOSIVE' ENGINES.

original application filed October 4, 1924, Serial No.

741,669. Divided and this app1ication led June 15,

1925. Serial No. 37,235.

Fig. 2 is a view likeFig. 1 but with the' auxiliary valvein the nature of a'spring controlled check valve.

and associated parts with the auxiliary valve controlled by a governor.

Fig. 4 is a sectional view of an intake man ifold illustrating aI structure wherein the -20 movement of an auxiliary inlet valve for air is in accordance with the thermal conditions prevailing.

Like `numerals designate corresponding parts in all of the figures of the drawing.

.Referring to the drawing 5 designates an intake manifold and 6 the connection tothe ',usual carburetor of an internal combustion engine, said carburetor not being shown. An auxiliary ,supply pipe, 7 n leads to the manifold 5 and it may conduct only heated air or it may conduct an auxiliary fuel charge. In either case an auxiliary air inlet valve 8, in Figs. 1, 2 and 3,-serves to control a port 9 for the admission of (atmospherie air to the pipe 7. The valve 8 is operable manually by means of the handle 10. In Fig.` .4 the valve 8a corresponds to the valve 8 in the other figures but in this case said valve is actuated bymeans ofl links 11 and 12 and expansibl'e element 13 located inthe intake manifold 5. Thus the movementl of the valve v8a is determined by the heat of the fuel mixture passing through the manifold. If this fuel mixture becomes unduly warm the valve 8a will open to admit an auxiliary supply of air through port 9a. In Fig. 1, 14c designates the main controlling valve of pipe 7. This valve is actuated ,1 through a crank arm 15 and spring 16 in Vunison with the main throttle valve 17 of the engine, said throttlev valve being operable by a rod 18..` A second rod or Wire 19, controllable from the dash lof, the vehicle,

is provided with a pin 20. O ne end of thel Fig. 3 is ,a sectional View` of 'a lmanifold spring 16 is attached to this pin and the other end of said spring is attached to the crank arm 15. Thus by shifting the rod 19 the tension of spring 16 may be varied and this in turn will determine the degree of movement of valve 14 in unison with the throttle valve 17.A

t In the form of the invention, illustrated in Fig. 2, the main controlling valve 14, corresponding in function to the valve 14, is spring actuated to closed position after the manner of a check valve by means of a spring 22;

In the form of the invention, illustrated in Fig. 3, the main controlling valve 14b is controlledy as to its movement by means of a governor of conventional form, indicated Yup4 at 14, the valve opening as the engines speed increases. l o

In the form of the invention illustrated in Fig. 4, a governor 24 acts to vary the tension of a spring 25,'one. end of which is connected to a lever 26. A spring 27 con-l nects the lever with the actuating rodl 18 of the throttle valve 17. However, in this case the movement of the lever 26 acts to vary the tension of the actuating spring' 221 of the auxiliary main valve 14d.

It is to be understood that theI invention is not limited to the precise constructions set forth but` that it includes, Within its purview, Whatever changes fairly come Within either the terms or the spirit of the appended claim. f

Having described my invention what I claim is:

The combination with the intake manifold of an internal combustion engine, of a carbureter connection leading thereto,l a throttle valve in said connection, an `auxiliary pipe leading from a side of said manifold in advance of the throttle valve, which pipe serves to conduct a fluid other than atmospheric air to the manifold, an auxiliary air inlet port in said pipe for the admission of atmospheric air of dilution thereto, a manually operable controlling valve for said port and a main valve inthe auxiliary pipe,

etvveen the auxiliary air inlet valve'and the manifold, controllable with the throttle valve. l

In testimony whereof he afxes his signature.

f t :ALFRED V. CHAPIN. 

